package Calculator;

public class Calculator {
  private static int result; // 静态变量，用于存储运行结果
  public void add(int n) {
      result = result + n;
  }
  public void substract(int n) {
      result = result - 1; // Bug: 正确的应该是 result =result-n
  }

  public void multiply(int n) {
  } // 此方法尚未写好

  public void divide(int n) {
      result = result / n;
  }

  public void square(int n) {
      result = n * n;
  }

  public void squareRoot(int n) {
      for (;;)
          ; // Bug : 死循环
  }

  public void clear() { // 将结果清零
      result = 0;
  }

  public int getResult() {
      return result;
  }
}
